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प्रश्न
The following graph shows the species - area relationship. Answer the following questions as directed.
(a) Name the naturalist who studied the kind of relationship shown in the graph. Write the observations made by him.
(b) Write the situations as discovered by the ecologists when the value of 'Z'
(Slope of the line) lies between.
(i) 0.1 and 0.2
(ii) 0.6 and 1.2
What does 'Z' stand for?
(c) When would the slope of the line 'b' become steeper?
उत्तर
(a) The German naturalist and geographer Alexander von Humboldt studied the species–area relationship. He found that species richness within a region increased with increasing area but up to a certain limit. The relationship between species richness and area turned out to be rectangular hyperbola for a wide variety of taxa.
(b)
(i) If the value of Z lies in the range of 0.1−0.2, then it is regardless of taxonomic group or region.
(ii) If the value of Z lies in the range of 0.6−1.2, then the slope of the line will be much steeper.
Z stands for the slope of the line or regression coefficient.
(c) If the species–area relationship is for very large areas such as the entire continent, then the slope of the line will be much steeper.
संबंधित प्रश्न
Explain, giving three reasons, why tropics show greatest levels of species diversity.
Which of the following hypothesis states: Rich species diversity leads to lesser variation in biomass production over a period of time.
Oxygen dissociation curve for Myoglobin has the following shape:
The pattern of biodiversity is affected by ______.
What does the term ‘Frugivorous’ mean?
There is greater biodiversity in tropical /subtropical regions than in temperate region. Explain.
Given below is an equation describing the Species-Area relationship between species richness and area for a wide variety of taxa as angiosperm plants, birds, bats etc. S = CAz
- Give a graphical representation of the given equation showing Species-Area relationship.
- What does 'S' represent in the given equation?
- What is the value of 'Z' (regression coefficient) for frugivorous birds and mammals in the tropical forests of different continents?
The species-area relationship is represented on a log scale as ______.
The relation between species richness and area for a wide variety of taxa appears as ______.
Alexander von Humboldt observed that, within a region species richness ______ with increasing explored area.
